Socket.io node.js Math.random get different results on all users

Question

I'm currently developing a poker texas holdem application using node.js, socket.io and javascript.

The problem I'm having is when I try to shuffle the deck using a math.random function it shuffles the deck as intended but it shuffles the deck differently to for each user connected to the the application.

Basically I want to be able to shuffle the deck using some kind of random function but still shuffle it the same way for all users.

I'm using io.sockets.emit(); to use the shuffle function on all users.

Answer 1

Shuffle the deck on the server side (node.js) and then send every user his cards and community cards.